{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S203P-Z50","brand":"ABB","brandSlug":"abb","productSlug":"S203P-Z50","canonicalUrl":"https://aoctrl.com/abb/S203P-Z50","factsUrl":"https://aoctrl.com/api/mcp/products/S203P-Z50","rawCanonicalId":null},"summary":{"shortDescription":"ABB, System pro M compact, Molded Case Circuit Breaker, S203P-Z50, 0.45 kgs, current lifecycle.","salesMarkdown":"This is a molded case breaker, so it's built for the main distribution or large feeder circuits — not the little branch breakers in a lighting panel. The System pro M compact form factor snaps onto DIN rail inside a standard industrial enclosure. For the site electrical engineer, the question is whether the SCCR and trip curve (Z-curve, from the code suffix) coordinate with your downstream gear. The Z-curve means it's sensitive — trips fast on low overcurrents, which makes it a fit for semiconductor or sensitive-load protection where you can't let a small fault ride through.","metaTitle":"ABB S203P-Z50 Molded Case Circuit Breaker, Current Productio","metaDescription":"ABB S203P-Z50 molded case circuit breaker, 0.45 kgs. Current lifecycle stage. Sourced to order against RFQ. Category: Circuit Breakers, Fuses & Protection.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Part #":"S203P-Z50","Weight":"0.45 kgs","Category":"Circuit Breakers","Sub Category":"Molded Case Circuit Breakers","Top Category":"Circuit Breakers, Fuses & Protection","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$91.44","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S203P-Z50/alternatives.json"},"ai":{"faq":[{"question":"Will the S203P-Z50 drop into a panel specified around the S201PR-K20?","answer":"Both are molded case breakers from the same System pro M compact family, so the DIN-rail footprint and bus-bar pitch are shared. The deciding factor is the trip curve: the S203P-Z50 carries a Z-curve (sensitive, fast trip), while the S201PR-K20 uses a K-curve (higher inrush tolerance for motor or transformer loads). Verify the coordination study before swapping — they are not drop-in equivalents for the same protection role."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S203P-Z50","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/S203P-Z50 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}